No one will be able to survive if the land, water and atmosphere are seriously polluted.
当土地、水和大气受到了严重污染，没有人能存活。
It has to be noticed that the air we breathe is already seriously polluted by the exhaust factories and vehicles give off.
必须注意的是：我们呼吸的空气已经被工厂和交通工具所释放的废气严重污染了。
But for cities where water sources have been quite seriously polluted, differentiated water supply modes according to water quality demand might be adopted for different areas.
对于水源污染较严重的城市，则可采取分区分质供水方式。
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